Cab roof



FIG. 1 is a front perspective view of a cab roof showing the claimed design in an environment in which it may be used;

FIG. 2 is a top view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a back view thereof;

FIG. 6 is a right side view thereof; and,

FIG. 7 is a left side view thereof.

The dashed broken lines in the figures show portions of the cab roof or environmental subject matter that form no part of the claimed design. The dot-dash broken lines in the figures show boundaries that form no part of the claimed design. 

CLAIM The ornamental design for a cab roof, as shown and described. 